Abstract:
An alarm device applied to a portable electronic device is provided. The alarm device includes a detection unit and a connecting unit. The detection unit includes a first data transfer pin, and the first transfer pin is preset to a first electric potential. When the portable electronic device is connected to the detection unit via the connecting unit, the first data transfer pin is connected to a second electric potential via the connecting unit. The detection unit is set in a detection mode. In the detection mode, when electric potential of the first data transfer pin is switched from the second electric potential to the first electric potential, the detection unit issues an alarm.
Abstract:
A screen capturing method and an electronic device using the same are provided. The screen capturing method includes that a continuous track is inputted. The continuous track includes a first stroke and a second stroke, and a first recording point is captured at a first moment of the first stroke, a second recording point is captured at a second moment of the second stroke. The first recording point includes a first velocity, and the second recording point includes a second velocity. The first velocity and the second velocity form an angle. A capturing box of a preset shape is enabled when the strokes meet the determining condition. An image is captured via the capturing box.
Abstract:
An image capturing method of a touch display module is disclosed. The image capturing method includes the steps of defining a first axial; defining a second axial which is perpendicular to the first axial; detecting a motion track on the touch display module, wherein the motion track includes at least an angle or a curve; calculating a first length which is the length of the motion track projecting to the first axial; calculating a second length which is the length of the motion track projecting to the second axial; and capturing a selecting range according to the first length and the second length. This invention also discloses an electronic device.
Abstract:
A power adaptor is provided. The power adaptor includes a voltage converter, a connecting port, a first transformer and a controller. The voltage converter receives an input voltage and determines whether to convert the input voltage to an output voltage according to an indicating signal. The first transformer includes a primary side and a secondary side. The primary side and the secondary side are coupled to each other, and a first end and a second end of the secondary side are coupled to the connecting port, respectively. The controller generates the indicating signal according to a voltage at the primary side of the first transformer. The connecting port is used to connect to an electrical device, and when the connecting port is electrically connected to the electrical device, a first end and a second end of the secondary side are short to a reference ground end of the secondary side.
Abstract:
A method for recording a track and an electronic device using the same are provided. When the electronic device loads an operation system, the recording module is automatically enabled and enters a standby state. When a display unit of the electronic device displays an operating interface and the recording module is triggered, the recording module is switched from the standby state to an active state. When the recording module is at the active state, a drawing layer is displayed and covers the operating interface, and an input track is received via the drawing layer. When a storing command is received, the input track is stored to obtain a composite image.
Abstract:
A short-circuit protection circuit adapted to a voltage regulator module is provided. The voltage regulator module includes a high side transistor and a low side transistor. The short-circuit protection circuit includes a short-circuit detecting circuit, a first switch, and a second switch. The short-circuit detecting circuit includes a detecting terminal coupled with the high side transistor. The high side transistor is connected with the low side transistor and a load, and the low side transistor is coupled with a ground. The first switch is connected with the low side transistor in parallel. The second switch coupled between the high side transistor and the power supply. The first switch is turned on before the power supply is powered on, the short-circuit detecting circuit sends a detecting voltage to the high side transistor via the detecting terminal to determine whether the high side transistor is short-circuited to control to second switch.
Abstract:
A heat dissipating device includes a supporting part, a plurality of first fins and a plurality of second fins. The first fins are disposed in a vertical array at the supporting part. The second fins are disposed in an inclined array at the supporting part. The first fins and the second fins are staggeredly disposed and adjacent to each other correspondingly. The heat exchange efficiency of the fins is improved so as to increase the heat dissipating efficiency of the heat dissipating device.
Abstract:
An electronic device includes a main body, a metal cover, an antenna and a magnetic flux inducer unit. The metal cover is disposed at the main body and the main body includes a nonmetal covered portion. The antenna is disposed in the main body. The magnetic flux inducer unit is disposed in the main body and located between the nonmetal covered portion and the antenna. The permeability of the magnetic flux inducer unit is greater than 1.